Slow Cheetah is a Visual Studio addin (VSIX Installer available here: https://visualstudiogallery.msdn.microsoft.com/69023d00-a4f9-4a34-a6cd-7e854ba318b5) that enables build specific transformations for any XML configuration file (similar to the out of the box Visual Studio support for Web.config transformation files). Here is a blog from Scott Hanselman talking about the tool: http://www.hanselman.com/blog/SlowCheetahWebconfigTransformationSyntaxNowGeneralizedForAnyXMLConfigurationFile.aspx